

My urine output is significantly lower than intake
Hi, my creatinine and eGFR have been getting worse very quickly lately. My nephrologist did blood work and ultrasound and confirmed there's nothing obvious that would cause my issues, and I'm not leaking protein or anything.
However, I've decided to track my intake vs output and in the last 9 hours I've drank 3500ml and I've urinated 1000ml. My urine has also not been pale yellow, but instead more yellow (but not dark).
I'm scared to consume more fluids as there is 2.5L unaccounted for in my body.
I did sweat the bed last night enough to drench my clothes, but even then there's a lot of unaccounted for fluids.
Is it safe to consume more? I'm unsure why my body isn't urinating as much. I go for blood work in a few days and we will see where my numbers are, but for now that doesn't help.
Thanks!